With on- and off- resonant excitation photons, spin-resolved Auger electron spectra of epitaxial CrO2 thin films show an experimental evidence of the spin-selective KLL Auger decay. The on-resonance O KLL Auger electrons are found to be highly spin-polarized, while the off-resonance ones with almost zero spin polarization. These results lead to conclude that the two-hole final state in KLL Auger decay is a spin-singlet. Applications to spin-resolved absorption spectroscopy are discussed.
@article{arxiv.cond-mat/0107234,
title = {Experimental evidence of the spin selection rule in KLL Auger transition},
author = {D. J. Huang and W. P. Wu and C. F. Chang and J. Chen and S. C. Chung and L. H. Tjeng and C. T. Chen and S. G. Shyu and C. C. Wu},
journal= {arXiv preprint arXiv:cond-mat/0107234},
year = {2007}
}